How did the Ice Bucket Challenge start?

The Ice Bucket Challenge for ALS/MND was a phenomenal social media campaign that swept the world in the last half of 2014. It was initiated by Pat Quinn, a former athlete and Pete Frates, a former Boston College captain. Both men are living with motor neurone disease (MND) in the US. When Peter Frates posted his challenge online, the Ice Bucket Challenge quickly went viral, spreading to Australia in early August 2014 and sparking the involvement of over 60,000 Australians.